Sean O'Reilly

SEAN O'REILLY

FRONTEND DEVELOPER

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Frontend Developer with 4–5 years of experience delivering high-performance web applications using React, Next.js, and TypeScript. Strong background in modern client–server data flows, Supabase, and React Query. Experienced in architecting component libraries, optimizing rendering performance, and building maintainable, scalable interfaces. Collaborative problem-solver who prioritizes accessibility, reliability, and clean engineering practices.

PROFESSIONAL EXPERIENCE

Lead Frontend Developer

April 2025 - Present

LIFO Data | Netherlands (Remote)

  • Architected frontend infrastructure for AI-powered inventory management platform using Next.js and TypeScript
  • Built real-time image recognition dashboard with React Query for optimized API integration and caching
  • Optimized React Query implementation, reducing API calls by 70% and significantly improving dashboard performance
  • Collaborated with international team across multiple time zones, coordinating with backend engineers and product designers to deliver MVP features within 3-month timeline

Freelance Frontend Developer

March 2023 - Present

Independent Contractor

Sean Patrick Studios

  • Design and develop modern web applications using Next.js App Router, TypeScript, and Tailwind CSS
  • Build full-stack applications with Supabase for backend services, authentication, and real-time database functionality
  • Implement efficient data fetching and state management with React Query for optimized API integration and caching
  • Create responsive, accessible interfaces with a focus on performance and user experience
  • Deploy and maintain applications using Vercel and modern CI/CD practices

Frontend Developer

January 2022 - March 2023

TrendyMinds Inc | Indianapolis, IN / St. Petersburg, FL (Remote)

  • Architected and developed high-performance web applications using Next.js, TypeScript, and Tailwind CSS
  • Built reusable component libraries with a strong focus on accessibility standards and user experience
  • Integrated Craft CMS with modern frontend frameworks, creating efficient content management workflows
  • Implemented technical SEO solutions and performance optimizations, significantly improving client site metrics

Freelance Developer

May 2021 - January 2022

Sean Patrick Studios

  • Developed custom, responsive websites using Next.js, TypeScript, and Sanity CMS
  • Created intuitive user interfaces with Tailwind CSS and custom styling solutions
  • Implemented headless CMS architectures for optimal content management and site performance

TECHNICAL SKILLS

Frontend Development

Astro, Next.js (App Router and Pages Router), React, TypeScript, JavaScript, Tailwind CSS, CSS/Sass, HTML, Alpine.js

Backend & Data Services

Supabase, PostgreSQL, React Query, REST APIs, Authentication with Clerk, Firebase, Next Auth, and Supabase Auth

Content Management

Sanity CMS, Craft CMS, Headless Architecture, WordPress

Tools & Deployment

Git, GitHub, Vercel, Netlify

Additional Skills

Web Accessibility (A11y), Performance Optimization, SEO

EDUCATION

University of Kansas

Class of 2014

BS History & Sociology

Le Wagon Coding Bootcamp

2021

Full-Stack Development Program